Exmark QUEST 408 Operator's Manual page 45

Note: Ensure the oil filter gasket touches the
engine, then an extra 3/4 turn is completed.
Note: Dispose of the used oil at a recycling
center.
5. Slowly pour approximately 80% of the specified
oil into the filler tube—use oil recommended in
the Checking the Engine Oil Level section.
Figure 46
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6. Check the oil level; refer to Checking the
Engine Oil Level section.
7. Start the engine and check for leaks.
Servicing the Spark Plug
Service Interval: Every 100 hours/Yearly
Ensure that the air gap between the center and side
electrodes is correct before installing the spark plug.
Use a spark plug wrench for removing and installing
the spark plug and a gapping tool or feeler gauge to
check and adjust the air gap. Install a new spark plug
if necessary.
Type: Champion
Air Gap: 0.030 inch (.76 mm)
45
Maintenance
Figure 47
(whichever comes first)
Every 500 hours/Every 2
years (whichever comes
first)—Replace the spark
plug (Kohler engine).
®
RN9YC or equivalent
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